public class Test1 {
    public static class Main {
        public static String tolowercase(String s) {
            String str1 = s.toLowerCase();
            return str1;
        }


        public static void main(String[] args) {
            String str = new String ("Hello Word!");
            String str1 = Main.tolowercase(str);
            System.out.println(str1);

        }

    }
}
